EAS100 Lecture Notes - Lecture 6: Mohs Scale Of Mineral Hardness, Friedrich Mohs, Silicate Minerals

• School: University of Alberta
• Department: Earth and Atmospheric Sciences
• Course: EAS100
• Professor: Virginia Garcia Millan

Document Summary

Rock cycle links to other spheres and climate. About 90 naturally occurring elements commonly portrayed in the. Remember: electrons are responsible for chemical properties. Stability is created by losing, gaining or sharing electrons. Atoms that have lost or gained electrons. Higher the charge difference often stronger bonds. Defined as: sharing or transfer of electrons to promote stability. Attraction between ions of opposite charge (cations to anions) A very strong attraction between two or more atoms. Share electrons in a mutually beneficial relationship. Type of covalent bond where the electrons are free to move amongst the ions. Bonding in solids typically produces a crystal lattice. A measure of the ease with which the surface can be scratched. Devised by friedrich mohs (1822) austrian mineralogist. Tendency of the mineral to break along planar surfaces. Planar surface that has broken through the weak bond between atoms or molecules. Number of planes and geometric pattern of the cleavage is diagnostic.